Add worktree command (#255945)

* Basic functionality of adding worktree

* Code refactoring and clean up

* Remove accidentally added submodules

* Specify folder destination

* Remove default worktree path, always prompt for destination instead

* create worktree only displayed in repo's worktree subcommands

* Git - handle another error condition when detecting worktrees (#256278)

* Rework creating worktree flow

* Include worktree name placeholder

---------

Co-authored-by: Ladislau Szomoru <3372902+lszomoru@users.noreply.github.com>

extensions/git/package.json

@@ -539,6 +539,12 @@
         "category": "Git",
         "enablement": "!operationInProgress"
       },
+      {
+        "command": "git.createWorktree",
+        "title": "%command.createWorktree%",
+        "category": "Git",
+        "enablement": "!operationInProgress"
+      },
       {
         "command": "git.deleteWorktree",
         "title": "%command.deleteWorktree%",
@@ -1295,6 +1301,10 @@
           "command": "git.deleteTag",
           "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
         },
+        {
+          "command": "git.createWorktree",
+          "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
+        },
         {
           "command": "git.deleteWorktree",
           "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
@@ -2556,8 +2566,13 @@
       ],
       "git.worktrees": [
         {
-          "command": "git.deleteWorktree",
+          "when": "scmProviderContext == repository",
+          "command": "git.createWorktree",
           "group": "worktrees@1"
+        },
+        {
+          "command": "git.deleteWorktree",
+          "group": "worktrees@2"
         }
       ]
     },